Enhanced ethanol production from stalk juice of sweet sorghum by response surface methodology

Zhao, S. and Wang, B. and Liang, X. (2012) Enhanced ethanol production from stalk juice of sweet sorghum by response surface methodology. African Journal of Biotechnology, 11 (22). pp. 6117-6122.

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Sweet sorghum (sugar sorghum, Sorghum bicolor) is one kind of non-grain energy crops. As a novel green regenerated high-energy crop with high utility value, high yield of biomass, the sweet sorghum is widely used and developed in China. Stalk juice of sweet sorghum was used as the main substrate for ethanol production by a Saccharomyces cerevisiae strain because of the high content of sugar. Effects of different medium compositions, including urea, KH2PO4 and MgSO4, on ethanol production were studied by response surface methodology in this paper. A second-order model that related the concentration of ethanol was developed and thus the optimal medium composition was obtained, which was 4.75 g l-1 urea, 3.58 g l-1 KH2PO4, and 0.98 g l-1 MgSO4. Under this condition, the highest ethanol concentration reached 86.2 g l-1.

Item Type: Article
Additional Information: The work was supported by the Foundation for Development of Science and Technology of Shandong Academy of Sciences (grant no. 201008) and the National Basic Research Development Program of China (grant no. 2007CB707800).
Uncontrolled Keywords: Ethanol, sweet sorghum, stalk juice, medium composition, response surface methodology.
Author Affiliation: Hebei University of economics and business, Shijiazhuang, China,Key Laboratory for Biosensors of Shandong Province, Jinan 250014, China, Key Laboratory for Biomass Gasification Technology of Shandong Province, Jinan 250014, China
Subjects: Plant Production
Postharvest Management
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 27 Mar 2012 03:39
Last Modified: 27 Mar 2012 03:40
Official URL: http://dx.doi.org/10.5897/AJB11.1701
URI: http://eprints.icrisat.ac.in/id/eprint/4197

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